Biofilm-enhanced adsorption of strong and weak cations onto different microplastic sample types: use of spectroscopy, microscopy and radiotracer methods

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dc.contributor.authorJohansen, MPen_AU
dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorDavis, Jen_AU
dc.contributor.authorHoward, DLen_AU
dc.contributor.authorHowell, NRen_AU
dc.contributor.authorPrentice, Een_AU
dc.date.accessioned2021-12-09T23:31:08Zen_AU
dc.date.available2021-12-09T23:31:08Zen_AU
dc.date.issued2019-07-01en_AU
dc.date.statistics2021-11-22en_AU
dc.description.abstractThe adsorption of metals and other elements onto environmental plastics has been previously quantified and is known to be enhanced by surface-weathering and development of biofilms. However, further biofilm-adsorption characterisation is needed with respect to the fate of radionuclides. This study uses spectroscopy, microscopy and radiotracer methods to investigate the adsorption capacity of relatively strong and weak cations onto different microplastic sample types that were conditioned in freshwater, estuarine and marine conditions although marine data were limited. Fourier-transform infrared spectroscopy confirmed that surface oxidation chemistry changes induced by gamma irradiation were similar to those resulting from environmental exposures. Microscopy elemental mapping revealed patchy biofilm development, which contained Si, Al, and O, consistent with microbial-facilitated capture of clays. The plastics+biofilm of all sample types had measurable adsorption for Cs and Sr radiotracers, suggesting environmental plastics act broadly as a sink for the key pervasive environmental radionuclides of 137Cs and 90Sr associated with releases from nuclear activities. Adsorption onto high-density polyethylene plastic types was greater than that on polypropylene. However, in most cases, the adsorption rates of all types of plastic+biofilm were much lower than those of reference sediments and roughly consistent with their relative exchangeable surface areas. Crown Copyright © 2019 Published by Elsevier Ltd.en_AU
dc.identifier.citationJohansen, M. P., Cresswell, T., Davis, J., Howard, D. L., Howell, N. R., & Prentice, E. (2019). Biofilm-enhanced adsorption of strong and weak cations onto different microplastic sample types: use of spectroscopy, microscopy and radiotracer methods. Water Research, 158, 392-400. doi:10.1016/j.watres.2019.04.029en_AU
dc.identifier.issn0043-1354en_AU
dc.identifier.journaltitleWater Researchen_AU
dc.identifier.pagination392-400en_AU
dc.identifier.urihttps://doi.org/10.1016/j.watres.2019.04.029en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12413en_AU
dc.identifier.volume158en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectPlasticsen_AU
dc.subjectAdsorptionen_AU
dc.subjectRadioisotopesen_AU
dc.subjectTracer techniquesen_AU
dc.subjectMicroscopyen_AU
dc.subjectSpectroscopyen_AU
dc.subjectCationsen_AU
dc.titleBiofilm-enhanced adsorption of strong and weak cations onto different microplastic sample types: use of spectroscopy, microscopy and radiotracer methodsen_AU
dc.typeJournal Articleen_AU
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